The Colt M4 Carbine is a spot on .22 LR replica of the current carbine version of the M-16 machine gun issued to US military. The Colt M4 Carbine Semi-Automatic Rifle in .22 LR is manufactured exclusively by Walther under license from Colt, making it the only genuine Colt tactical rimfire replica available in the world. These replica rifles have a carbine-length barrel, a collapsible stock, and a removable carry handle. As with the original, the upper and lower receivers are made of high quality aluminum. Additional features include: a windage adjustable rear sight, an elevation-adjustable front post sight, a threaded muzzle and steel flash suppressor, a bolt catch, and a functioning dust cover. This rifle comes with the original factory box. Its stock, metal, and bore are all in very good condition.